31423759940 has 24 divisors (see below), whose sum is σ = 66000056640. Its totient is φ = 12567568608.

The previous prime is 31423759931. The next prime is 31423759949. The reversal of 31423759940 is 4995732413.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31423759931) and next prime (31423759949).

It is not an unprimeable number, because it can be changed into a prime (31423759949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15959 + ... + 251201.

It is an arithmetic number, because the mean of its divisors is an integer number (2750002360).

Almost surely, 2^31423759940 is an apocalyptic number.

It is an amenable number.

31423759940 is an abundant number, since it is smaller than the sum of its proper divisors (34576296700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31423759940 is a wasteful number, since it uses less digits than its factorization.

31423759940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241931 (or 241929 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 31423759940 in words is "thirty-one billion, four hundred twenty-three million, seven hundred fifty-nine thousand, nine hundred forty".